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Old 03-02-2011, 09:51 AM
RangerGuy25 RangerGuy25 is offline
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Default Please Help!! No clue what is wrong

So my '01 xlt 3.0 had a really bad shudder/vibration going on at around 50 mph and also when stopped at say, a stop light. Also had smoke coming from the exhaust at the first bend, underneath the oil pan and after the driver side manifold. Replaced the coil pack and the problem went away for awhile. Then a code p401, EGR flow blockage, popped up and the shudder and smoking pipe came back. So I replaced the plug wires, EGR valve, DPFE, and EGR solenoid. Shudder has gotten a little better but still there, especially when put into reverse or drive with foot on the brake. When reversing it feels like its going to stall out and not quite as bad when accelerating from a stop. Shudder/jumping also happens when going about 50 mph again. The code has popped back up (yet) and no clue what the hell is going on. Please help I am at my wits end on this one!!!
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Old 03-02-2011, 04:19 PM
Fordzilla80 Fordzilla80 is offline
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Default Re: Please Help!! No clue what is wrong

How bad does the shudder get? No 3.0 ever runs smooth like a Mercedes, so a little vibration/shudder is normal. Do you have a tachometer on the truck? If so, what does it read when you're at stops? What did your old EGR look like as far as deposits/gunk/performance?
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Old 03-02-2011, 07:14 PM
RangerGuy25 RangerGuy25 is offline
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Default Re: Please Help!! No clue what is wrong

the tach doesn't read any real fluctuation. At stops it reads fine. The truck feels like its choking out. It's not a normal vibration. In reverse it feels like its trying not to stall. I guess it might be more of a jump or a choking. I'll try and get some video of it and post it up so everyone can see what is going on. The exhaust pipe had smoke coming off just after the first bend on the driver side as well. I drilled a hole there and it felt like it might be blocked. I took it for a short drive and when I got back I looked in the hole I had drilled and it was glowing red hot inside the pipe. My only guess as of right now is that the pipe has a blockage there and that i'm going to have to remove the whole exhaust and replace it, and possibly the manifolds as well.

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I've replaced all of the egr stuff besides the tube and besides some rust it looks fine. Same with the manifolds.
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Old 03-05-2011, 07:47 AM
RangerGuy25 RangerGuy25 is offline
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Default Re: Please Help!! No clue what is wrong

Thanks for the reply. I'm going to take the exhaust off today and see what that does and then possibly the manifolds.
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Old 03-19-2011, 11:56 AM
RangerGuy25 RangerGuy25 is offline
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Default Re: Please Help!! No clue what is wrong

Gotta it all figured out. Somehow the plug wires for 5 & 6 got switched. Kinda feel like an idiot but oh well.
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Old 03-19-2011, 12:15 PM
DangerRanger2000 DangerRanger2000 is offline
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Default Re: Please Help!! No clue what is wrong

^ LOL that will do it
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